https://bugs.winehq.org/show_bug.cgi?id=42000
--- Comment #18 from Olivier F. R. Dierick o.dierick@piezo-forte.be --- (In reply to Olivier F. R. Dierick from comment #17)
Since Wine 2.17 (or 2.15...2.16 I can't remember) the Blizzard app does work in win7 mode for me.
Ignore that, I was talking about bug 43349.
This bug is still present with Wine 2.18.